public override Expression Parse(IEnumerable <Token> postFixTokens, ExpressionFactory expressionFactory)
{
Stack <Expression> expTree = new Stack <Expression>();
List <Expression> children = new List <Expression>(4);
foreach (Token t in postFixTokens)
{
for (int i = 0; i < t.GetChildCount(); i++)
{
try
{
children.Add(expTree.Pop());
}
catch (InvalidOperationException emptyStackError)
{
throw new InvalidExpressionException("InvalidExpression TODO", emptyStackError);
}
}
children.Reverse();
expTree.Push(expressionFactory.CreateExpression(t, children));
children = new List <Expression>();
}
if (expTree.Count != 1)
{
throw new InvalidExpressionException("InvalidExpression Or Expressions consists of multiple uncombinable expressions. TODO");
}
return(expTree.Pop());
}
public void CreateExpression_ExpressionNotImplemented()
{
var expressionOperator = _fixture.Create <string>();
var expressionFactory = new ExpressionFactory(new List <ITransportCommandFactory>());
expressionFactory.CreateExpression($"[{expressionOperator}] text", Transport);
}
public void CreateExpression_GetInternalOperator()
{
var expressionOperator = "MessageContains";
var expressionFactory = new ExpressionFactory(new List <ITransportCommandFactory>());
var result = expressionFactory.CreateExpression($"[{expressionOperator}] text", Transport);
Assert.IsNotNull(result);
Assert.AreEqual(expressionOperator, result.Operator);
}
public void CreateExpression_GetExternalOperator()
{
var internalOperator = "ExternalCommand";
var externalOperator = "SendMessage";
var commandFactory = new Mock <ITransportCommandFactory>();
commandFactory.Setup(x => x.TransportName).Returns(Transport);
commandFactory.Setup(x => x.CreateCommand(It.IsAny <string>()))
.Returns(new Mock <ITransportCommand>().Object);
var expressionFactory = new ExpressionFactory(new List <ITransportCommandFactory> {
commandFactory.Object
});
var result = expressionFactory.CreateExpression($"[{internalOperator}] [{externalOperator}] text", Transport);
Assert.IsNotNull(result);
Assert.AreEqual(internalOperator, result.Operator);
}